Cisco 642-997 Online Practice Questions and Exam Preparation

Cisco 642-997 Online Questions & Answers

• Question 1:

  In Cisco Nexus 7000 Series Switches, which three statements about SPAN are true? (Choose three.)

  A. SPAN source ports can be the in-band interface to the supervisor engine control plane of the switch.
  B. SPAN monitor ports can be routed ports.
  C. SPAN destination ports can be configured in only one SPAN session at a time.
  D. The Cisco Nexus 7000 supports virtual SPAN feature.
  E. SPAN destination port actively participates in spanning-tree instance.
  F. SPAN destinations cannot be an RSPAN VLAN.
  A. SPAN source ports can be the in-band interface to the supervisor engine control plane of the switch.
  C. SPAN destination ports can be configured in only one SPAN session at a time.
  D. The Cisco Nexus 7000 supports virtual SPAN feature.

• Question 2:

  Which statement about implementation of Cisco TrustSec on Cisco Nexus 5546 or 5548 switches are true?

  A. Cisco TrustSec support varies depending on Cisco Nexus 5500 Series Switch model.
  B. The hardware is not able to support MACsec switch-port-level encryption based on IEEE 802.1AE.
  C. The maximum number of RBACL TCAM user configurable entries is 128k.
  D. The SGT Exchange Protocol must use the management (mgmt 0) interface.
  B. The hardware is not able to support MACsec switch-port-level encryption based on IEEE 802.1AE.

  ---

  Reference: https://scadahacker.com/library/Documents/Manuals/Cisco%20- %20TrustSec%20Solution%20Overview.pdf

• Question 3:

  Which Cisco Nexus feature is best managed with DCNM-SAN?

  A. VSS
  B. domain parameters
  C. virtual switches
  D. AAA
  B. domain parameters

  ---

  The Fibre Channel domain (fcdomain) feature performs principal switch selection, domain ID distribution, FC ID allocation, and fabric reconfiguration functions as described in the FC-SW-2 standards. The domains are configured on a per

  VSAN basis. If you do not configure a domain ID, the local switch uses a random ID.

  This section describes each fcdomain phase:

  Principal switch selection -- This phase guarantees the selection of a unique principal

  switch across the fabric.

  ?

  domain ID.

  ?

  FC ID allocation -- This phase guarantees a unique FC ID assignment to each device attached to the corresponding switch in the fabric.

  ?

  Fabric reconfiguration -- This phase guarantees a resynchronization of all switches in the fabric to ensure they simultaneously restart a new principal switch selection phase.

  Reference:

  http://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/5_2/configuration/g uides/sysmgnt/DCNM-SAN/sysmgmt_dcnm/sysmgmt_overview.html#wp1051962

• Question 4:

  Which topology is not supported when using vPC?

  A. a single-homed server to a single FEX that is connected to two Cisco Nexus 5500 Series Switches
  B. a dual-homed server to two FEXs, each connected to two Cisco Nexus 5500 Series Switches
  C. a dual-homed server to two FEXs that are connected to one Cisco Nexus 5500 Series Switch
  D. a dual-homed server to a single FEX that is connected to two Cisco Nexus 5500 Series Switches
  C. a dual-homed server to two FEXs that are connected to one Cisco Nexus 5500 Series Switch

  ---

  The figure shows unsupported topology where a vPC is between hosts and two FEXs that are connected to one Cisco Nexus 5500 Series device. This topology does not provide a good high availability solution because the server loses the connectivity to the network when the Cisco Nexus 5000 Series device fails.

  Figure: Unsupported Topology--Host vPC With One Cisco Nexus 5000 Series Device

  

  

  If you need to connect a multi-homing server to a pair of FEXs when there is only one Cisco Nexus 5000 Series device, you have the option to run active or standby NIC teaming from the server.

  Reference:

  http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/mkt_ops_guides/513 _n1_1/n5k_enhanced_vpc.html

• Question 5:

  The Connectivity Management Processor monitors the active supervisor module on a Cisco Nexus 7000 switch and will reboot the device in the event of a lights-out management issue. However, which option includes features that provide

  similar benefits in the absence of the Connectivity Management Processor?

  A. high-availability functionality from features such as vPC and NSF
  B. traditional system connectivity models like SNMP, GUI, or SSH
  C. Cisco FabricPath
  D. VDC failover
  A. high-availability functionality from features such as vPC and NSF

  ---

  vPC uses the vPC peer-keepalive link to run hello messages that are used to detect a dual- active scenario. A Gigabit Ethernet port can be used to carry the peer-keepalive messages. A dedicated VRF is recommended to isolate these control messages from common data packets. When an out-of-band network infrastructure is present, the management interfaces of the Cisco Nexus 7000 supervisor could be also used to carry keep-alive connectivity using the dedicated management VRF. When the vPC peer-link is no longer detected, a dual-active situation occurs, and the system disables all vPC port channel member on the "secondary" vPC peer (lower vPC role priority value). Also SVI interfaces associated to a vPC VLAN are suspended on the secondary switch. As a result, in this condition only the "primary" vPC peer actively forwards traffic on the vPC VLANs. Multiple peer-keepalive links can be used to increase resiliency of the dual-active detection mechanism.

  Both the Cisco Catalyst 6500 and the Cisco Nexus 7000 offer a variety of high-availability features. Some of the primary features to highlight are In Service Software Upgrade (ISSU), Stateful Switchover (SSO), and Nonstop Forwarding (NSF). The operation and the behavior of these features are unique to the respective platform and can be independently executed without affecting the interoperability between the two platforms.

  Reference: http://www.cisco.com/c/en/us/products/collateral/switches/catalyst-6500-series- switches/white_paper_c11_589890.html

• Question 6:

  If you are using NAT in your data center, which load balancing would you be likely to use within your GLBP configuration?

  A. none
  B. round-robin
  C. host dependent
  D. weighted
  C. host dependent

• Question 7:

  Which four options are capabilities of the Cisco Nexus 5000 and 5500 Series Switch? (Choose four.)

  A. line rate
  B. managed by a parent switch
  C. lossless 10 Gigabit Ethernet
  D. lossless 100 Gigabit Ethernet
  E. low latency
  F. extremely low latency
  G. hosts a virtual supervisor module
  A. line rate
  C. lossless 10 Gigabit Ethernet
  E. low latency
  G. hosts a virtual supervisor module

• Question 8:

  Between which two types of ports does FIP establish Fibre Channel virtual links? (Choose two.)

  A. VE Ports and VE Ports
  B. N Ports and F Ports
  C. VN Ports and VF Ports
  D. VP Ports and VE Ports
  E. VE Ports and VF Ports
  F. E Ports and E Ports
  A. VE Ports and VE Ports
  C. VN Ports and VF Ports

  ---

  FIP aims to establish virtual FC links between VN_Ports and VF_Ports (ENode to FCF), as well as between pairs of VE_Ports (FCF to FCF), since these are the only legal combinations supported by native Fibre Channel fabrics. Standards-compliant implementations are not required to support both forms of virtual FC links, and Cisco has decided to focus initially on implementing FIP only between ENodes and FCFs. FCF-to- FCF connectivity is considered a strategic direction for end-to-end FCoE deployments, but the short-term urgency is for FCoE adoption between CNAs and the Fibre Channel fabric perimeter, where unified fabric can offer the greatest capital expenditure (CapEx) savings today.

  Reference: http://www.cisco.com/c/en/us/products/collateral/switches/nexus-7000-series- switches/white_paper_c11-560403.html

• Question 9:

  Which three options are capabilities of the Cisco Nexus 7000 Series Switch? (Choose three.)

  A. All interface and supervisor modules are accessible from the front.
  B. All interface and supervisor modules are accessible from the rear.
  C. single power supply only
  D. multiple power supply option for redundancy
  E. up to 180.7 Tbps forwarding capacity with Fabric-2 modules with 10-slot switches
  F. up to 18.7 Tbps forwarding capacity with Fabric-2 modules with 18-slot switches
  A. All interface and supervisor modules are accessible from the front.
  D. multiple power supply option for redundancy
  F. up to 18.7 Tbps forwarding capacity with Fabric-2 modules with 18-slot switches

• Question 10:

  Which three options are CallHome predefined destination profiles that are supported on Cisco NX-OS? (Choose three.)

  A. CiscoTAC-1
  B. full-text-destination
  C. pager-xml-destination
  D. short-text-destination
  E. xml-text-destination
  F. pager-json-destination
  A. CiscoTAC-1
  B. full-text-destination
  D. short-text-destination